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| author | Xiaolin Zhang <xiaolin.zhang@intel.com> | 2017-12-05 14:45:32 +0800 |
|---|---|---|
| committer | Zhenyu Wang <zhenyuw@linux.intel.com> | 2017-12-11 17:23:11 +0800 |
| commit | f5f00e7dcc4161f07b76ff1a854e8b1ea7a1ed41 (patch) | |
| tree | 23b9198b1ba88d266562a854242ff20241a5f3e8 /drivers/gpu | |
| parent | 11474e9091cf2002e948647fd9f63a7f027e488a (diff) | |
| download | linux-stable-f5f00e7dcc4161f07b76ff1a854e8b1ea7a1ed41.tar.gz linux-stable-f5f00e7dcc4161f07b76ff1a854e8b1ea7a1ed41.tar.bz2 linux-stable-f5f00e7dcc4161f07b76ff1a854e8b1ea7a1ed41.zip | |
drm/i915/gvt: Fix pipe A enable as default for vgpu
observed igt drv_module_reload test case failure on 4.15.0
rc2 kernel with panic due to no active pipe available.
the gpu will reset during unload/load and make pipe config reg
lost which can cause kernel panic issue happen.
this patch is to move pipe enabling to emulate_mointor_status_chagne
to handle vgpu reset case as well.
Fixes: 7e6059020894 ("drm/i915/gvt: enabled pipe A default on creating vgpu")
Signed-off-by: Xiaolin Zhang <xiaolin.zhang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/display.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/gvt/display.c b/drivers/gpu/drm/i915/gvt/display.c index 355120865efd..309f3fa6794a 100644 --- a/drivers/gpu/drm/i915/gvt/display.c +++ b/drivers/gpu/drm/i915/gvt/display.c @@ -266,6 +266,8 @@ static void emulate_monitor_status_change(struct intel_vgpu *vgpu) /* Clear host CRT status, so guest couldn't detect this host CRT. */ if (IS_BROADWELL(dev_priv)) vgpu_vreg(vgpu, PCH_ADPA) &= ~ADPA_CRT_HOTPLUG_MONITOR_MASK; + + vgpu_vreg(vgpu, PIPECONF(PIPE_A)) |= PIPECONF_ENABLE; } static void clean_virtual_dp_monitor(struct intel_vgpu *vgpu, int port_num) @@ -282,7 +284,6 @@ static void clean_virtual_dp_monitor(struct intel_vgpu *vgpu, int port_num) static int setup_virtual_dp_monitor(struct intel_vgpu *vgpu, int port_num, int type, unsigned int resolution) { - struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv; struct intel_vgpu_port *port = intel_vgpu_port(vgpu, port_num); if (WARN_ON(resolution >= GVT_EDID_NUM)) @@ -308,7 +309,7 @@ static int setup_virtual_dp_monitor(struct intel_vgpu *vgpu, int port_num, port->type = type; emulate_monitor_status_change(vgpu); - vgpu_vreg(vgpu, PIPECONF(PIPE_A)) |= PIPECONF_ENABLE; + return 0; } |